Improvement in steam-geneeators



H. T. FENTON, OF PHILADELPHIA, PENNSYLVANIA.`

Lettera Fatent No. 75,141,'dated March 8, 1868.

IMPROVEMENT 4IN STEAM-Grammaire.

.titte tlgetale Infant tt iu tlgtsre tablir @tout mit mating part tfllge amr.

TO ALL WHO IT MAY CONCERN:

` Be itknown that I, I-I. T. FENTON, of Philadelphia, Pennsylvania, haveinvented certain new and useful Improvements in Steam-Boilers; and I dohereby declare the following to be a full, clear, and exact descriptionof the same. v

My invention consists of the improvementsfully described hereinafter, inthe steam-boiler for which Letters Patent were granted to me on theseventh day of May, 1867.

In'orderto enable others skilled in the art to make and use myinvention,-I will now proceed to describe its construction andoperation, reference being had to the accompanying drawing, which formsa part of this speeifica-tion, and in which- Figure .1 is a verticalsection of my improved steam-boiler.,

Figure 2, a sectional plan on the line 1-2, iig. l; and

Figure 3, a sectional plan on the line 8 4, g, 1.-

Similar letters refer to similar parts throughout the several views.

A is the cylindrical shell of the boiler, B the fire-box, whichcommunicates with a centraliluc-ehambcr formed by the casing D, Withinthis chamber are arranged radially a number of vertical tubes, E, theupper and lower bent endsof which are so connected to the casingl D,that the tubes may have a free communication both above and belowwiththe water space of the boiler, the number of tubes depending uponthe size of the` liuc-chamber.

In the boiler `for which Letters Patent weregranted tome on the seventhof May, 1867, the innercylindrical easing D extended from the'top of theresbox to the top of the boiler, but in my present improvements thecasing D terminates at a point below the water-line, a series of tubes,F, extending from the top e of the casing D, tothe top'j` ofthe boiler,so that theprorlncts of combustion, after being concentrated intheeentrai chamber,

will pass upwards through the tubes E to the chimney.

AFor portable purposes, such as steam tire-engines and steamfcarriages,'-xe iirc-box may be made square, and the rest, or the part above the{ire-box, cylindrical, to allow of`a more extended iresuri`aee,and alarger eoncentration'of heat, but the form may be varied, and adapted asrequired toV suit any peculiarities of cireum. stances or position,whether for land or marine purposes.

While my improved boiler` possesses all the advantages of that for whichthe aforesaid patent `was granted to me, it hasthe further advantage ofpreventing the too rapid escape of the. products of combustion from thecentral chamber, vwithin which they circulate prior to passing oli'through the tubes F to the chimney.

Additional heatingfsurface is also imparted by these tubes, the upperportions of which tend to superheat .the steam'.

I claim as my invention, and desire to secure by-Letters Patent?-The-vertical boiler, its fire-box B, central chamber D,` pipes E, andtubes F, the whole being arranged substantially as and for-the purposeherein set forth.

In testimony whereof, I have signed my name to this specification in thepresence of two subscribing witnesses.

H. fr'. FENTON.

Witnesses:

JOHN WHITE, W. J. R. DELANY.

